Valve for coke ovens



Mar. 13, 1923.

W. E. ROBERTS. VALVE FOR COKE OVENS- FILED SEPT. 10

Patented Mar. 13, 1923.

amino sr res nane WILLIAM E. ROBERTS, OF NEW YORK, N. Y., ASSIGNOR o FOUNDATION OVEN conro RATION, on NEW. YORK, N. Y'., A CORPORATION OF NEW YORK.

VALVE FOR COKE OVENS.

Application filed September 10, 1919. Serial No. 322,961.

' To all whom it may concern:

1 a citizen of the United States, residing in.

Be it known that I, WILLIAM E. ROBEiiTs,

embodiment of the invention.

Fig. 2 is a front elevation of'the same,

into the axial admission port partly in cross-section on the line 2-2 0 Fig. 1; 1

Fig. 3 is an underside face view of an air re ister. lteferring now to the embodiment of the invention illustrated the oven wall is shown at A supported at intervals by buckstays B. A flue G serves as the .exit for gases of low thermal value, such for exampleasproducer gas, which has been preheated to increase its efliciency, and above this is a pair of flues D E (Fig. 2) alongside each other for admission of gas to each set of l eating flues in the oven. Gas is admitted alternately to the flues D and E.

The gas from C passes throu h a pipe F of a valve chamber and thence alternately through side ducts H and J to branch pipes K and L leading into the res ective flues D and E.

The valve casing has a central cylindrical portion N (Fig. 2) to form a bearing for the valve, with an outwardlyofl'set upper portion 0 to provide an enlargement of the chamber, and has external lateral passages P leading to the outlet ducts H and J and communicating with the valve chamber through ports Q in the cylindrical part. Within the valve chamber is a rotary valve R of the warped shape shown having an open semi-circular contour at the admission end and an approximately flat contour at the opposite end and having flanges S, Fig. 2, adapted to cover both ports Q in the position shown or to uncover said ports alternatively as the valve is rocked, so as to admit gas to one or the other of the oven flues D and E. The outer end of the valve casing is closed by a plate T. The valve is rocked by means of a stem U extending through the cover plate, carrying on its outer end an arm V for connection to any usual or suitable operating mechanism and having on its inner end a headW which is squared and fits in a diametral groove-in the outer face of the end plate X of the-valve.

The valve casing is provided at its inner endwith flanges Y which are bolted to the adjacent buckstays' B, and the pipes K and L are united by a plate Z. and provided with similar flanges '1 bolted to the buckstays. Thus the complete apparatus is firmly held in place. The ends of the admission pipe F and exit pipes K and L are introduced into the flues in the brickwork in the oven and a tight joint made with packing 20f clay or other suitable material. At the outer end of each of the pipes Kand L, in line with the horizontal portions thereof and with the flues D and E is a removable cover plate 3 to permit the insertion of a long cleaning tool into the flues and the horizontal portions of the pipes. V

Aseparate inlet to the valve is provided to be used with gas of high thermal value,

such as a coke oven gas. Such-.an opening lsshown ate (Fig-1) 1n the lowerport on of the admission end of the valve casing,

of a size; to accommodate the orclinarygas pipe and closed by a plug 5 when producer gas is to be used. When the coke oven gas is to be used the plug 5 is removed and a connection 5 substituted to the gas main. Preferably at the same time a thin closure plate 6 is introduced across the admission end of the valve casing, the connection with the pipe F being of course broken to permit the introduction of such plate.

There is a tendency to accumulate a deposit of solid carbon in the pipes and flues during the passage of gas. This can be burned out by admitting air to the hot flues.

I provide for such admission of air in small volume and continuously to one of the alternate flues while gas is being admitted to the other. For this purpose I provide an opening to the atmosphere on the side of the valve Opposite that on which the gas passes, the flanges S of the valve being ofsuch length that when the valve is oscillated to open the port Q, on one side of the gas space aboveit also opens the port Q on the opposite side to the air coming in from below. The air port consists of openings 7 covered by a plate 8 pivotally mounted and clamped in any desired angular position by a nut 9, the plate having openings 10 which can be turned to register to a greater or less extent with the openings 7 so as to regulate the quantity of air admitted (see Fig.

Though I have described with great particularity of detail a specific embodiment of my invention, yet it is not to be understood therefrom that the invention is restricted to the specific embodiment'disclosed. Various modifications thereof in detailand in the arrangement of the parts may be made by those skilled in the art without departure from the invention as defined in the follow ing claims.

What I claim is 1. The combination with a coke oven having a gas heating flue and a pair of admission flues of a valve casing having an admission pipe in line with and communicatingwith said gas heating flue, a valve cham her in line with said admission pipe, ducts on opposite sides of said valve chamber communicating with said pair of admission flues and having ports communicating with said valve chamber and a valve for alternately opening communication with said ducts. I

2. The combination with a coke oven having a gas heating flue and a pair of gas admission flues of a valve casing having an admission pipe in line with and communicating with said gas heating flue, a valve chamber in line with said admission pipe ducts on opposite sides of said valve chamber communicating with said pair of gas admission flues and having ports communicating with-said valve chamber and a valve for alternately opening communication with said ducts, said valve casing having a chamber below the valve open to atmosphere and said valve being adapted to alternately open communication between said last named chamber and said duets.

3. A valve structure for coke ovens comprising a casing having a substantially cylindrical shell forming a chamber with an axial admission port and lateral exit ports, conduits formed on opposite sides of said cylindrical portion and communicating through said exit ports with the chamber, a rotary valve in said chamber having flanges adapted to cover both of the exit ports in one position and to uncover both ports in its other position and yet only open communication between one of said exit ports and said axial admission port.

a. A valve structure for coke ovens com-- prising a casing having a substantially cylindrical shell forming a chamber with an axial admission port and lateral exit ports, conduits formed on opposite sides of said cylindrical portion and communicating through said exit ports with the chamber, a valve having an inclined wall dividing said chamber into two parts one of which communicates with the admission port in all positions of the valve and the other of which is open to atmosphere, said valve having curved flanges adapted to alternately cover and uncover said exit ports to admit gas and air alternately to said conduits.

In witness whereof, I have hereunto signed my name.

WILLIAM E. ROBERTS; V i 

